JP2004062366A - Information recording medium and its reading method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information recording medium and its reading method capable of improving security by providing a plurality of optical information with prescribed order or a prescribed direction in the case of reading out the optical information. <P>SOLUTION: The information recording medium 10 such as an ID card is provided with an optical information recording part 12 for recording a plurality of optical information in a card-like medium base material 11 so that the optical information can be optically read out, a magnetic tape (encoding auxiliary information recording part) for recording encoding auxiliary information including prescribed procedure and method for encoding a plurality of optical information, a CPU, a memory, and an IC chip 14 having a prescribed application processing function by communicating with an external device. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an information recording medium including an optical information recording unit that records a plurality of optical information such as optical patterns, and a method for reading the information recording medium.
[0002]
[Prior art]
Conventionally, counterfeiting of cash vouchers has frequently occurred, and a number of counterfeiting prevention means have been proposed. For example, Japanese Patent Application Laid-Open No. 7-65138 discloses a bar code recorded on a hologram as a means for preventing forgery, a sensor such as a CCD disposed at the reproduction position, and the reproduced bar code information is read by a machine and authenticated. A method for making a determination is disclosed.
[0003]
[Problems to be solved by the invention]
However, in the above-described conventional technology, a plurality of codes are recognized. However, a method for recognizing and decoding the codes is not described, and if the codes are specified only by finally aligning the codes, There was a problem that the code was easily recognized and the security was low.
[0004]
An object of the present invention is to provide an information recording medium with improved security by providing a predetermined procedure or method between the optical information when reading a plurality of optical information, and a method of reading the information recording medium. is there.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, an invention according to claim 1 includes an optical information recording unit (12) that optically records a plurality of optical information, a predetermined procedure for encoding the plurality of optical information, And / or a coded auxiliary information recording unit (13) for recording coded auxiliary information including a method.
[0006]
According to a second aspect of the present invention, there is provided an information recording medium which reads a plurality of optical information and codes the optical information according to coding auxiliary information including a predetermined procedure and / or method of coding the optical information. The reading method.
[0007]
According to a third aspect of the present invention, in the method for reading an information recording medium according to the second aspect, when the plurality of optical information is sequentially read, a predetermined procedure and / or method is provided between the respective optical information. A method for reading an information recording medium characterized by the following.
[0008]
According to a fourth aspect of the present invention, in the method for reading an information recording medium according to the second aspect, the coded auxiliary information is obtained in advance from a portion other than a recording unit of the plurality of optical information, and the plurality of optical information is sequentially read. A method for reading an information recording medium, comprising performing coding according to the coding auxiliary information when reading.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in more detail with reference to the drawings and the like.
FIG. 1 is a diagram showing an embodiment of an information recording medium according to the present invention.
The information recording medium 10 includes cards such as an ID card and a credit card, certificates, commuter passes, gift certificates such as gift certificates, and packages containing media such as computer software, CPUs, CD-ROMs, and DVDs. Can be applied.
[0010]
The information recording medium 10 of this embodiment is an example of an ID card, and an optical information recording unit 12 that records a plurality of optical information in a card-shaped medium base material 11 in an optically readable manner. A magnetic tape (coding auxiliary information recording unit) 13 for recording coded auxiliary information including a predetermined procedure / method for coding a plurality of optical information, a CPU and a memory, and communicating with an external device, and And an IC chip 14 having an application processing function.
[0011]
The optical information recording unit 12 is used as a authenticity authenticating body, in which an optical pattern such as a barcode pattern or an image is recorded by a hologram, a diffraction grating, or the like. Or it can be made separately and applied at any time.
[0012]
In addition, as a method of recognizing the optical information recording unit 12, a plurality of optical patterns reproduced by a light source are respectively detected by an image sensor or the like, and the detected data is coded according to the coding auxiliary information. Use as false judgment or data.
This coded auxiliary information is stored in another place of the medium, in this embodiment, on the magnetic tape 13, and is obtained in advance when recognizing the optical pattern.
[0013]
FIG. 2 is a block diagram showing an embodiment of an information recording medium reading device according to the present invention.
The reading device 20 includes an optical sensor 21 for reading an optical pattern recorded on the optical information recording unit 12 of the information recording medium 10, a magnetic sensor 22 for reading encoded auxiliary information recorded on the magnetic tape 13, and an optical sensor 21. And a coding unit 23 for coding a plurality of pieces of optical information read by the magnetic sensor 22 in accordance with the coding auxiliary information read by the magnetic sensor 22.
The reading device 20 is also provided with conveying rollers R1 and R2 for conveying the information recording medium 10, and guide plates G1 and G2 for guiding the information recording medium 10 during conveyance.
[0014]
FIG. 3 is an explanatory diagram showing a coding procedure and method of the information recording medium reading device according to the present embodiment.
When the information recording medium 10 is inserted, the reading device 20 performs predetermined initialization processing, and then reads the coded auxiliary information recorded on the magnetic tape 13 on the information recording medium 10 by the magnetic sensor 22. .
Here, it is stored that the logical auxiliary of a plurality of optical patterns (optical information) 12-1, 12-2, and 12-3 recorded in the optical information recording unit 12 is taken as the coded auxiliary information. And
[0015]
Next, as shown in FIG. 1, a plurality of optical patterns 12-1, 12-2, 12-3,... Are sequentially read by the optical sensor 21 along the read line RL.
[0016]
As shown in FIG. 2, the optical sensor 22 irradiates the optical patterns 12-1, 12-2, and 12-3 with light from the light source 21a, and the optical patterns 12-1, 12-2, and 12-3. 3B, the barcodes 12-1B, 12-2B, and 12-3B are reproduced at predetermined positions, as shown in FIG. When the information recording medium 10 is transported by the transport rollers R1 and R2, the barcodes 12-1B, 12-2B and 12-3B are scanned by the image sensor 21b disposed at the reproduction position. Similarly, they are sequentially read.
That is, as shown in FIG. 3A, when the optical patterns 12-1, 12-2, and 12-3 are reproduced, as shown in FIG. The bar codes 12-1B, 12-2B and 12-3B such as ▼ can be read separately.
[0017]
The coding unit 24 converts the barcodes 12-1B, 12-2B, and 12-3B read by the optical sensor 22 according to the coding auxiliary information read by the magnetic sensor 23 ("logical sum" in the present embodiment). Recognize and code sequentially.
By taking the “logical sum ((1) + (2) + (3))” of the bar codes 12-1B, 12-2B, and 12-3B of the above (1), (2), and (3), The barcode pattern 12c can be obtained.
[0018]
As described above, according to the present embodiment, a barcode obtained from a plurality of optical patterns is coded by taking "logical sum" each time, so that the coding procedure is complicated and security is improved. Can be improved.
If the optical information recording unit 12 is provided on a part of the information recording medium 10, the information recording medium 10 can be authenticated.
[0019]
Various modifications and changes are possible without being limited to the embodiment described above, and these are also within the equivalent scope of the present invention.
For example, the optical pattern is not a barcode pattern, but may be any image as long as it is optically readable.
The coding auxiliary information is not limited to the “logical sum” described above, but may be a “logical product”, a “random number” indicating the reading order of barcodes, or simply “what code Read ". This coded auxiliary information may be stored in the memory of the IC chip 14.
[0020]
【The invention's effect】
As described in detail above, according to the present invention, data obtained from a plurality of optical information is coded each time according to the coding auxiliary information, so that the data is finally aligned as in the related art. As compared with specifying the code, the coding procedure becomes complicated, and the security can be further improved.
[Brief description of the drawings]
FIG. 1 is a diagram showing an embodiment of an information recording medium according to the present invention.
FIG. 2 is a block diagram showing an embodiment of an information recording medium reading device according to the present invention.
FIG. 3 is an explanatory diagram showing a coding procedure and method of the information recording medium reading device according to the embodiment;
[Explanation of symbols]
Reference Signs List 10 Information recording medium 11 Medium base material 12 Optical information recording unit 13 Magnetic tape (coded auxiliary information recording unit)
14 IC
Reference Signs List 20 reading device 21 optical sensor 22 magnetic sensor 23 coding unit R1, R2 transport rollers G1, G2 guide plate

Claims (4)

An optical information recording unit that records a plurality of optical information so as to be optically readable,
A coding auxiliary information recording unit that records coding auxiliary information including a predetermined procedure and / or method of coding the plurality of optical information;
An information recording medium comprising: Reading a plurality of optical information and encoding according to the coded auxiliary information including predetermined procedures and / or methods of encoding the optical information;
A method for reading an information recording medium, comprising: The method for reading an information recording medium according to claim 2,
When sequentially reading the plurality of optical information, having a predetermined procedure and / or method between the respective optical information,
A method for reading an information recording medium, comprising: The method for reading an information recording medium according to claim 2,
The coding auxiliary information is obtained in advance from a part other than the recording unit of the plurality of optical information,
When sequentially reading the plurality of optical information, performing encoding according to the encoding auxiliary information,
A method for reading an information recording medium, comprising:

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